configure

#!/bin/sh

set -e
if [ ! -d sunxi-boards/sys_config/ ]; then
	git submodule init
	git submodule update sunxi-boards
fi

list_boards() {
	ls -1 sunxi-boards/sys_config/*/*.fex |
	sed -n -e 's|.*/\([^/]\+\)\.fex$|\1|p' | sort -V |
	sed -e 's|.*|\t* \0 \0-android|'
}

# keep the output `sh` friendly
# i.e., no spaces around the '='
generate_board_mk() {
	local board="${1%-android}" android= soc=

	[ "$board" = "$1" ] || android=yes
	soc=$(ls -1 sunxi-boards/sys_config/*/$board.fex 2> /dev/null | cut -d/ -f3)

	cat <<-EOT
	BOARD=$board
	ANDROID=$android
	SOC=$soc
	UBOOT_CONFIG=$board
	EOT

	case "$soc" in
	a10)
		cat <<-EOT
		MACH=sun4i
		KERNEL_CONFIG=sun4i${android:+_crane}_defconfig
		EOT
		;;
	a13)
		cat <<-EOT
		MACH=sun5i
		KERNEL_CONFIG=sun5i${android:+_nuclear}_defconfig
		EOT
		;;
	a20)
		cat <<-EOT
		MACH=sun7i
		KERNEL_CONFIG=sun7i${android:+_wing}_defconfig
		EOT
		;;
	*)
		echo "$soc: unsupported SoC" >&2
		return 1
		;;
	esac
}

usage() {
	cat <<-EOT >&2
	Usage: $0 <board>

	supported boards:
	EOT
	list_boards
}

if [ $# -eq 0 ]; then
	usage
elif ls -1 sunxi-boards/sys_config/*/${1%-android}.fex 2> /dev/null 1>&2; then
	out=chosen_board.mk
	if generate_board_mk "$1" > $out~; then
		mv $out~ $out
		echo "$1 configured. Now run \`make\`"
	else
		rm $out~
		exit 1
	fi
else
	echo "$1: invalid board name" >&2
	usage
	exit 1
fi